The article shows that in Society 5. 0 intellectual capital is a key factor forming economic security of enterprises. The priority of structural components of intellectual capital as a factor of enterprise economic security formation is determined. Features of mining and beneficiation enterprises operation are considered while structuring intellectual capital. The resulting criteria for assessing efficiency of the intellectual capital use during economic security formation are established. Three key groups of competences of personnel necessary for economic security formation are identified. It is substantiated that organic connection of intellectual capital structural elements will enable forming economic security of the enterprise during the current period and providing economic security parameters in the long term. Based on the data obtained from mining and beneficiation enterprises, it is demonstrated that this will be possible due to growth of an innovative level of technological processes which will contribute to product quality enhancement that, in turn, will expand the client base.